Water quality in Thornton, New Hampshire
Thornton is in Grafton County. 269 active public water systems serve the county; 117 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Grafton County
73 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| 175 Estates Thornton |
100 | 1 | 0.6 mi | |
| Mountain River Condos Thornton |
60 | 2 | 0.8 mi | |
| Northpointe Water Thornton |
48 | 1 | 0.9 mi | |
| Owls Nest Golf Club and Condos Thornton |
272 | 0 | 1.6 mi | |
| Waterville Acres Condos Thornton |
50 | 2 | 1.9 mi | |
| Campton Village Pct Campton |
600 | 1 | 1.9 mi | |
| Mill Brook Village Thornton |
113 | 0 | 2.0 mi | |
| Birch Bend Thornton |
28 | 2 | 2.2 mi | |
| Valley View Condos Campton |
25 | 2 | 2.5 mi | |
| Waterville Estate Vlg Dist/w Campton |
1,250 | 2 | 2.9 mi | |
| Chesleys MHP Campton |
60 | 0 | 3.0 mi | |
| Two Rivers Mhcc Campton |
234 | 0 | 3.1 mi | |
| Coachman Condos Campton |
50 | 0 | 3.2 mi | |
| Deer Run Campton |
150 | 1 | 3.2 mi | |
| White Mountain Resort/gateway Thornton |
213 | 0 | 3.4 mi | |
| Star Ridge Thornton |
96 | 0 | 3.7 mi | |
| Tripplewood Resort Condos Campton |
60 | 0 | 3.9 mi | |
| Beebe River Campton |
63 | 0 | 4.4 mi | |
| Jack O Lantern Condos Woodstock |
98 | 0 | 4.4 mi | |
| Red Sleigh Condos Campton |
44 | 2 | 5.9 mi | |
| Town Line Village Holderness |
193 | 0 | 7.6 mi | |
| Highland Colony Holderness |
88 | 0 | 7.9 mi | |
| Hawthorne Village Rumney |
55 | 2 | 8.1 mi | |
| Waterville Valley Water Dist Waterville Valley |
3,150 | 0 | 8.2 mi | |
| Woodstock Water Dept Woodstock |
2,950 | 0 | 8.8 mi |
Non-community systems in Grafton County (195: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Grafton County, nearest to Thornton first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files or the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Hampshire records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.